"Clocks" is a song by the British alternative rock band Coldplay. It was written and composed, as a collaboration between all the members of the band, for their second album, A Rush of Blood to the Head. Built around a piano riff, the song features cryptic lyrics of contrast and urgency themes. Several remixes of the track exist and its riff has been widely sampled.
"Clocks" debuted to critical and commercial success, with critics mainly commenting on the song's piano melody. It was released in the United Kingdom as the third single from A Rush of Blood to the Head, where it reached number nine in the UK Singles Chart. It was released in the United States as the album's second single, it reached number 29 on the Billboard Hot 100 and number 9 on Billboard's Modern Rock Tracks chart. It won the Grammy Award for Record of the Year.